GB2129141B - Borehole tool depth correction method using kalman filtering - Google Patents

Borehole tool depth correction method using kalman filtering

Info

Publication number
GB2129141B
GB2129141B GB08328672A GB8328672A GB2129141B GB 2129141 B GB2129141 B GB 2129141B GB 08328672 A GB08328672 A GB 08328672A GB 8328672 A GB8328672 A GB 8328672A GB 2129141 B GB2129141 B GB 2129141B
Authority
GB
United Kingdom
Prior art keywords
correction method
kalman filtering
depth correction
borehole tool
tool depth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB08328672A
Other versions
GB8328672D0 (en
GB2129141A (en
Inventor
David So Keung Chan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schlumberger NV
Schlumberger Ltd USA
Original Assignee
Schlumberger NV
Schlumberger Ltd USA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger NV, Schlumberger Ltd USA filed Critical Schlumberger NV
Publication of GB8328672D0 publication Critical patent/GB8328672D0/en
Publication of GB2129141A publication Critical patent/GB2129141A/en
Application granted granted Critical
Publication of GB2129141B publication Critical patent/GB2129141B/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/04—Measuring depth or liquid level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/26—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring depth
GB08328672A 1982-10-27 1983-10-27 Borehole tool depth correction method using kalman filtering Expired GB2129141B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/437,059 US4545242A (en) 1982-10-27 1982-10-27 Method and apparatus for measuring the depth of a tool in a borehole

Publications (3)

Publication Number Publication Date
GB8328672D0 GB8328672D0 (en) 1983-11-30
GB2129141A GB2129141A (en) 1984-05-10
GB2129141B true GB2129141B (en) 1986-07-30

Family

ID=23734892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08328672A Expired GB2129141B (en) 1982-10-27 1983-10-27 Borehole tool depth correction method using kalman filtering

Country Status (6)

Country Link
US (1) US4545242A (en)
GB (1) GB2129141B (en)
IN (1) IN158957B (en)
IT (1) IT1206333B (en)
NO (1) NO176335C (en)
OA (1) OA07574A (en)

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Also Published As

Publication number Publication date
GB8328672D0 (en) 1983-11-30
IT8323466A0 (en) 1983-10-26
OA07574A (en) 1985-03-31
NO176335B (en) 1994-12-05
IN158957B (en) 1987-02-28
IT1206333B (en) 1989-04-14
NO176335C (en) 1995-03-15
US4545242A (en) 1985-10-08
NO833813L (en) 1984-04-30
GB2129141A (en) 1984-05-10

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20031026